Travel complications have disrupted plans for fans attending the World Cup in the United States, particularly affecting citizens from 42 countries eligible for the Electronic System for Travel Authorization (ESTA) under the Visa Waiver Program (VWP). Many fans, including Scotland supporter Stephen Sloan, have reported that their ESTA applications, previously approved, have reverted to pending status, creating anxiety as they prepare for the tournament. Sloan's friend is facing travel issues just days before their scheduled flight to Boston for Scotland's match against Haiti. Meanwhile, Iraq fan Abdulla Adnan has encountered significant hurdles in his efforts to attend the tournament, having spent $1,800 on tickets and travel arrangements. He was unable to apply for a U.S. visa at the Jordanian embassy due to his nationality. The situation highlights the complexities of the U.S. visa system, which remains a critical factor for international fans hoping to attend the World Cup, as immigration law expert Celine Atallah noted that while FIFA sells tickets, the U.S. government ultimately decides who can enter the country.